Bridge



(No'Model.) 3 Sheets-Sheet 1. C. F. 'I'. KANDELBR.

BRIDGE. N0. 348,467. Patented Aug. 31, 1886.

Il Il NA PETERS, Phowumgnpher. wnhjnmn, u4 c (No Model.) 3 Sheets-Sheet2.

C. P. T. KANDBLER. Y

BRIDGE. No. 348,467, Patented Aug. 31,v 1886.

N. PETERS, Fhelcrl-iognmr. Wnhlngton, D. C.

(No Model.) 3 Sheets-Sheet 3. C. F. T. KANDELBR.

BRIDGE. No. 348,467. Patented Aug. 31, 1886.

hereinafter more fully set Nrrsn STATES l ATENT OFFICE.

BRIDGE.

SPECIFICATION forming part of Letters Patent No. 348,467, dated August31, 1886.

Application filed May 17, 1886. Serial No. 202,429. (No model.)

To all whom, it may concern:

Be it known that I, C. F. THEoDon KANDE- LER, a subject of the Emperorof Germany, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in Bridges;and I hereby declare the following to be a full, clear, and exactdescription of the same.

My invention relates particularly to the class of pivot or draw bridges.In the larger structures of this class in which it is quite common tocenter the weight of the bridge by means of cross-girders upon thecentral pivot,diieulty is experienced by the frequent breakage of theguide Wheels, provided in circular series around the pivot, by unequalpressure. The cause of this frequent breakage is due to the unequalbearing of the members of the circular series of wheels, owing to thepractical impossibility of constructing` a mathematicallyperfectcircular track for them, and to various other conditions, principalamong which may be mentioned the unequal settling and shrinkage of theparts.

It is my object to provide means for preventing the frequent breakage ofthese guide- Whcels, by enabling them to be adjusted,witl1 reference tothe track upon which they move, to afford to them uniform bearing; andto this end my invention consists in the general construction by which Iaccomplish my object, and it also consists in certain details ofconstruction and combinations of parts, all as forth.

In the drawings, Figure l is a plan view of so much of the part of adraw-bridge which surrounds the pivot as will serve to illustrate myimprovementwithout crowding the figure; Fig. 2, a broken section takenfrom Fig. l and enlarged; Fig. 3, a side elevation of one of thecircular series of wheels and parts connected therewith; Fig. 4, asection taken on the line 4 4 of Fig. 2; Fig. 5, a section taken on theline 5 5 of Fig. 3,- and Fig. 6, a broken horizontal section taken justabove the central plate in Fig. l, and showing the construction towardthe central part of the pivotal device.

A, Fig. l, is the circle supported on the center pier, provided with theusual peripheral rack, A', and a track, B, formed of segments, and inthe present instance inclined on its upper surface from the center ofthe circle.

C C are the cross-girders, which rest at their ends at opposite sides ofthe circle A, and at their centers upon a cross-girder, C', the gir- 55ders C and C' thus serving to support the structure and center itsentire weight. rIhis manner of centering the weight is designed torelieve the wheels D as much as possible, and in well-constructedbridges almost entirely from 6o pressure of the structure when unloaded,the wheels taking up the pressure of extra weight imposed upon thebridge. Thus, when the bridge is closed and free from superimposedweight, the wheels D should properly rest without great pressure uponthe track B, and have perfect and true bearing thereon,in order thatwhen a train of cars or other moving body passes over it the weightthereof may be equally distributed uponall the wheels in the 7o circleand upon their entire bearing-surfaces.

From various causes, as hereinbefore stated, uniform bearing of thewheels D upon the track is prevented, whereby some wheels are not onlymade to withstand excessive pressure, and others thus relieved fromtheir predetermined share, but the bearing-surfaces of the wheels becomedisarranged and bear unequally, the consequence being frequent fractureof wheels, entailing great expense and 8o trouble in the maintenance ofthe bridge.

To prevent the aforementioned consequences, I render the wheels Dindependently adjustable in lateral as Well as vertical directions,thelatter including also the vertical adjustment of opposite sides ofthe wheel to bring the entire bearing-surface on the periphery intocontact with the track when distorted therefrom.

The wheels D are constructed with a view 9o to lightness and strength,and are preferably provided with steel tires r, shrunk thereon in acommon manner to form the peripheries and beveled on theirbearing-surfaces, as shown,to coincide with the inclined surface of thetrack B. Each wheel is provided with au axle, E, supported injournal-bearings F, to extend `in radial line with the center of thecircle A,the journal-bearings comprising boxes carrying suspendedI-beams G, through the medium of :oo

hangers H on opposite sides of the I- beams, and provided with eyes q at'their lower extremities, through which bolts p are passed to securethem to the I- beams. The hangers H extend toward their upper endsthrough transversely-elongated openings o (see Fig. 2) in thejournal-boxes F, and are held by nuts o. The wheels D revolve upon theiraxles, which are prevented from rotation by means of colters a, insertedthrough them toward their outer ends, and confined between the sides ofslots in the outer edges of the top plates of the journal-boxes. Theinner end of each axle is provided with a tongue, m, (sec Fig. 5,) uponwhich to bolt a clevis, I, holding one end of a rod, l', which extendstoward the center of the circle A, and is held in a clevis, 12, boltedto the center plates, K, which may be riveted around the pivotal part ofthe struct' ure, as shown. The tie-rods L, shown in Figs. 1 and 6 asheld toward their inner ends by clevises L', bolted to the side of andbelow the plates K,and at their opposite ends by similar clevises,extend to the girders G and serve to brace them.

The construction and connections of the wheels permit their adjustmentin lateral and vertical directions, as hereinbefore stated. Thus thelateral adjustment of the tread of any wheel upon the track B is edectedby turning the rod 1 of that particular wheel by means of a suitablewrench applied to the rod, whereby in turning it in one direction therod is screwed into the clevises I I2 at its opposite ends, therebydrawing the wheel toward the center and holding it, while turning it inthe opposite direction forces the wheel, by the action of the screwportions shown in Fig. 2, away from the center and holds it.

To adjust a wheel vertically, the nuts o are tightened or loosened, and,when the bearing surface of a wheel is out of parallel line with thetrack, whereby it fails to bear uniformly, or bears only on'a portion ofthe tire, the nuts o on one side are loosened and those on the oppositeside tightened. The turning of the nuts o on both sides of the wheelsserves the further purposes of shifting the weight from the wheels tothe center pivot, or vice versa, depending upon the direction of turningthe nuts.

What I claim as new, and desire to secure by Letters Patent, i s

1. The combination, with a draw-bridge, of guide-wheels D, independentlyadjustable in lateral and vertical directions, substantially as and forthe purpose set forth.

2. The combination, in a draw-bridge, of an inclined circular track, B,a series of wheels, D, having inclined bearing-surfaces to coincide withthe track, and means, substantially as described, for adjusting thewheels D in vertical and lateral directions with reference to the track,substantially as set forth.

3. The combination, in a drawbridge, of a track, B, wheels D, stationaryaxles E, carrying the wheels, journal-boxes F, I-beams G, hangers H,connecting the journal-boxes with the I-beams, and means, substantiallyas described, for adjusting the wheels D independently of each otherwith reference to the track in vertical and lateral directions, substan`tially as and for the purpose set forth..

4. The combination, in a draw-bridge, of an inclined track, B, wheels D,having inclined peripheries to coincide with the track, stationary axlesE, carrying the wheels, journalboxes F, provided with elongated openingso, I-beams G, hangers H, having eyes q at their lower extremities, andbolted through the eyes to the I-beams, and extending through theopenings o in the journal-boxes, and means, substantially as described,for adjusting the wheels D independently of each other with reference tothe track in vertical and lateral directions, substantially as and forthe purpose set forth.

5. The combination, in a draw-bridge, of an inclined track, B, wheels D,having steel tires a", inclined on their bearing-surfaces to coincidewith the track, axles E, carrying the wheels, journal-boxes F, providedwith elongated openings o', colters n, extending through and connectingthe axles with the journalboxes t-o prevent rotation of the axles,I-beams G, hangers H, having eyes q at their lower extremities andbolted through the eyes to the I-beams and extending through theopenings o in the journalboxes, and means, substantially as described,for adjusting the wheels D independently of each other with reference tothe track in vertical and lateral directions, substantially as and forthe purpose set forth.

6. The combination, in a draw-bridge, of an inclined track, B, wheels D,having inclined peripheries to coincide with the track, stationary axlesE, carrying the wheels, journalboxes F, provided with elongated openingso, I-beams G, hangers H, having eyes' q at their lower extremities, andbolted through the eyes to the I-beams, and extending through theopenings vo in the journal-boxes, nuts o, holding the hangers within theopenings in the journal-boxes and affording means to adjust the wheelsvertically and produce uniform bearing thereof upon the track, and rodsI', connected by clevises I to the inner ends 'of the axles, and byclevises I2 toward the center of thefcircle described by the track,substantiall y as and for the purpose set forth.

C. F. THEODOR KANDELER.

In presence of J. WV. DYRENFORTH, HENRY HUDSON.

IIO

